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This TV has a strange problem where for the first 20 minutes it is on, everything looks great, but then after it is fully warm, the vertical linearity goes out of range of the control, to the point it can't be adjusted (top half of screen looks elongated). I am suspecting the electrolytic cap on the vertical output tube's cathode, or maybe some resistors drifting after they reach full operating temperature. I haven't yet got a schematic for this set, and will be unable to work on it for a few days.
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08-19-2011, 04:41 PM
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